Column

Donors

862939

Females

49%

Males

51%

prediabetic

16.1%

diabetic

4.6%

till date

Nov 21,'25

Column

Donors

Donor density by zipcode using combined donors counts from Mar’25 and Aug’25 are mapped.

Diabetics

Percentage of diabetic, prediabetic, and normoglycemic donors by age-group are shown in this barplot.
For every age-group, a higher percentage of black and hispanic donors are diabetic than other races.

Gender

Boxplots for A1c% by age-group are compared between female and male donors.
Median values are labeled for each.
For each age-group, males have higher median value than females.

Race

Boxplots for A1c% by age-group are compared between asian, black, hispanic, and white donors.
Median values are labeled for each.
For each age-group, black donors have higher median value than others.

US estimates

US weighted estimates for diabetes and prediabetes, determined from NHANES 2021-2023 A1c lab data, is compared with the subset of Red Cross donor population.
For any age group, the percentage of diabetics or prediabetics is higher in the overall US estimated prevalence.

Zipcodes

Use filter to select zipcodes by donor diabetes prevalence

Circles represent zipcodes
Zipcodes with high percentage of diabetic donors are colored purple, and with low percentage are green.
Click on a circle to see related information for the specific zipcode in the pop-up
Use mouse scroll button to zoom in or out

Summary by glycemia

Donor Characteristics

Characteristic

normal
N = 683,806

prediabetes
N = 139,286

diabetes
N = 39,847

gender, n (%)

F

351,873 (83%)

58,144 (14%)

12,745 (3.0%)

M

331,933 (75%)

81,142 (18%)

27,102 (6.2%)

race/ethnicity, n (%)

Hispanic Origin

36,533 (82%)

6,255 (14%)

1,961 (4.4%)

NH Asian/other

44,376 (78%)

9,860 (17%)

2,665 (4.7%)

NH Black

21,964 (67%)

8,490 (26%)

2,445 (7.4%)

NH White

580,933 (80%)

114,681 (16%)

32,776 (4.5%)

age, Median (Q1, Q3)

49 (33, 63)

64 (55, 70)

64 (55, 71)

age group, n (%)

-29

140,301 (97%)

3,558 (2.5%)

764 (0.5%)

30-54

265,317 (87%)

30,818 (10%)

8,389 (2.8%)

55-

278,188 (67%)

104,910 (25%)

30,694 (7.4%)

median household income, Median (Q1, Q3)

58,376 (46,110, 76,021)

56,313 (45,415, 72,737)

54,048 (44,012, 69,214)

By test months

Donor characteristics by test months

Donor characteristics

Mar'25, N=3761451

Aug'25, N=3007151

Nov'25, N=1860791

A1c%

5.30 (5.10, 5.50)

5.40 (5.20, 5.60)

5.30 (5.10, 5.60)

Glycemia

normal

307,522 (82%)

227,016 (75%)

149,268 (80%)

prediabetes

51,731 (14%)

58,291 (19%)

29,264 (16%)

diabetes

16,892 (4.5%)

15,408 (5.1%)

7,547 (4.1%)

gender

F

182,688 (49%)

146,873 (49%)

93,201 (50%)

M

193,457 (51%)

153,842 (51%)

92,878 (50%)

Race

Hispanic Origin

18,888 (5.0%)

14,320 (4.8%)

11,541 (6.2%)

NH Asian/other

22,531 (6.0%)

20,094 (6.7%)

14,276 (7.7%)

NH Black

13,734 (3.7%)

10,428 (3.5%)

8,737 (4.7%)

NH White

320,992 (85%)

255,873 (85%)

151,525 (81%)

Age

54 (37, 66)

55 (41, 66)

48 (30, 63)

Age Group

-29

65,258 (17%)

33,573 (11%)

45,792 (25%)

30-54

126,467 (34%)

112,203 (37%)

65,854 (35%)

55-

184,420 (49%)

154,939 (52%)

74,433 (40%)

First-Time Donor

49,867 (13%)

35,125 (12%)

39,509 (21%)

BMI group

70,856 (19%)

50,393 (17%)

21,611 (12%)

morbid obestiy

35,306 (9.4%)

30,470 (10%)

18,607 (10.0%)

normal

92,564 (25%)

70,165 (23%)

52,635 (28%)

obese

61,747 (16%)

52,496 (17%)

31,895 (17%)

overweight

114,913 (31%)

96,772 (32%)

60,846 (33%)

underweight

758 (0.2%)

416 (0.1%)

483 (0.3%)

BMI

27.4 (24.2, 31.2)

27.5 (24.4, 31.5)

27.2 (24.0, 31.0)

1Median (Q1, Q3); n (%)

By month/glycemia

Mar'25

Aug'25

Nov'25

Characteristic

normal
N = 307,5221

prediabetes
N = 51,7311

diabetes
N = 16,8921

normal
N = 227,0161

prediabetes
N = 58,2911

diabetes
N = 15,4081

normal
N = 149,2681

prediabetes
N = 29,2641

diabetes
N = 7,5471

A1c%

5.20 (5.00, 5.40)

5.80 (5.70, 6.00)

7.10 (6.70, 7.90)

5.30 (5.10, 5.40)

5.80 (5.70, 6.00)

7.10 (6.70, 7.80)

5.20 (5.10, 5.40)

5.80 (5.70, 6.00)

7.10 (6.70, 7.90)

Gender

F

156,262 (86%)

21,154 (12%)

5,272 (2.9%)

117,304 (80%)

24,524 (17%)

5,045 (3.4%)

78,307 (84%)

12,466 (13%)

2,428 (2.6%)

M

151,260 (78%)

30,577 (16%)

11,620 (6.0%)

109,712 (71%)

33,767 (22%)

10,363 (6.7%)

70,961 (76%)

16,798 (18%)

5,119 (5.5%)

Race

Hispanic Origin

15,797 (84%)

2,311 (12%)

780 (4.1%)

11,087 (77%)

2,451 (17%)

782 (5.5%)

9,649 (84%)

1,493 (13%)

399 (3.5%)

NH Asian/other

18,131 (80%)

3,415 (15%)

985 (4.4%)

14,837 (74%)

4,149 (21%)

1,108 (5.5%)

11,408 (80%)

2,296 (16%)

572 (4.0%)

NH Black

9,597 (70%)

3,159 (23%)

978 (7.1%)

6,019 (58%)

3,422 (33%)

987 (9.5%)

6,348 (73%)

1,909 (22%)

480 (5.5%)

NH White

263,997 (82%)

42,846 (13%)

14,149 (4.4%)

195,073 (76%)

48,269 (19%)

12,531 (4.9%)

121,863 (80%)

23,566 (16%)

6,096 (4.0%)

Age

50 (34, 64)

64 (56, 71)

64 (56, 71)

51 (37, 64)

64 (55, 70)

64 (56, 71)

44 (25, 59)

62 (52, 69)

63 (54, 70)

Age Group

-29

63,844 (98%)

1,071 (1.6%)

343 (0.5%)

32,204 (96%)

1,162 (3.5%)

207 (0.6%)

44,253 (97%)

1,325 (2.9%)

214 (0.5%)

30-54

112,880 (89%)

10,268 (8.1%)

3,319 (2.6%)

95,901 (85%)

13,035 (12%)

3,267 (2.9%)

56,536 (86%)

7,515 (11%)

1,803 (2.7%)

55-

130,798 (71%)

40,392 (22%)

13,230 (7.2%)

98,911 (64%)

44,094 (28%)

11,934 (7.7%)

48,479 (65%)

20,424 (27%)

5,530 (7.4%)

First-Time Donor

45,761 (92%)

2,992 (6.0%)

1,114 (2.2%)

29,319 (83%)

4,485 (13%)

1,321 (3.8%)

35,765 (91%)

2,932 (7.4%)

812 (2.1%)

BMI group

55,579 (78%)

11,258 (16%)

4,019 (5.7%)

36,582 (73%)

10,683 (21%)

3,128 (6.2%)

16,505 (76%)

3,912 (18%)

1,194 (5.5%)

morbid obestiy

23,597 (67%)

8,291 (23%)

3,418 (9.7%)

18,119 (59%)

9,104 (30%)

3,247 (11%)

11,977 (64%)

4,884 (26%)

1,746 (9.4%)

normal

85,955 (93%)

5,483 (5.9%)

1,126 (1.2%)

61,514 (88%)

7,507 (11%)

1,144 (1.6%)

48,041 (91%)

3,966 (7.5%)

628 (1.2%)

obese

45,864 (74%)

11,665 (19%)

4,218 (6.8%)

35,507 (68%)

13,093 (25%)

3,896 (7.4%)

22,991 (72%)

6,970 (22%)

1,934 (6.1%)

overweight

95,803 (83%)

15,006 (13%)

4,104 (3.6%)

74,913 (77%)

17,870 (18%)

3,989 (4.1%)

49,288 (81%)

9,515 (16%)

2,043 (3.4%)

underweight

723 (95%)

28 (3.7%)

7 (0.9%)

379 (91%)

33 (7.9%)

4 (1.0%)

464 (96%)

17 (3.5%)

2 (0.4%)

BMI

26.6 (23.7, 30.4)

29.9 (26.6, 33.9)

31.2 (27.8, 35.3)

27.0 (24.0, 30.5)

29.5 (26.4, 33.5)

31.0 (27.6, 35.3)

26.6 (23.6, 30.2)

29.5 (26.4, 33.5)

31.0 (27.8, 35.4)

1Median (Q1, Q3); n (%)